declare namespace Ext {
    export namespace selection {
        export interface TreeModelConfig {
            allowDeselect?: boolean;
            enableKeyNav?: boolean;
            ignoreRightMouseSelection?: boolean;
            listeners?: object;
            mode?: "SINGLE" | "SIMPLE" | "MULTI";
            selectOnExpanderClick?: boolean;
            toggleOnClick?: boolean;
        }

        export class TreeModel extends Ext.selection.RowModel  {
        }
    }
}